Heavy fermions vs doped Mott physics in heterogeneous Ta-dichalcogenide bilayers.

ABSTRACT: Controlling and understanding electron correlations in quantum matter is one of the most challenging tasks in materials engineering. In the past years a plethora of new puzzling correlated states have been found by carefully stacking and twisting two-dimensional van der Waals materials of different kind. Unique to these stacked structures is the emergence of correlated phases not foreseeable from the single layers alone. In Ta-dichalcogenide heterostructures made of a good metallic "1H"- and a Mott insulating "1T"-layer, recent reports have evidenced a cross-breed itinerant and localized nature of the electronic excitations, similar to what is typically found in heavy fermion systems. Here, we put forward a new interpretation based on first-principles calculations which indicates a sizeabl

SUBMITTER: Crippa L 

PROVIDER: S-EPMC10866876 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature